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WO2011118617A1 - Composition de résine polyamide pour partie coulissante, partie coulissante et procédé de production d'une partie coulissante et d'une automobile - Google Patents

Composition de résine polyamide pour partie coulissante, partie coulissante et procédé de production d'une partie coulissante et d'une automobile Download PDF

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Publication number
WO2011118617A1
WO2011118617A1 PCT/JP2011/056942 JP2011056942W WO2011118617A1 WO 2011118617 A1 WO2011118617 A1 WO 2011118617A1 JP 2011056942 W JP2011056942 W JP 2011056942W WO 2011118617 A1 WO2011118617 A1 WO 2011118617A1
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WO
WIPO (PCT)
Prior art keywords
component
weight
resin composition
polyamide resin
sliding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/056942
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English (en)
Japanese (ja)
Inventor
繁数 岡村
広昭 藤井
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Ube Corp
Original Assignee
Ube Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ube Industries Ltd filed Critical Ube Industries Ltd
Priority to CN2011800162674A priority Critical patent/CN102884133A/zh
Priority to KR1020127027248A priority patent/KR20130018265A/ko
Priority to JP2012507028A priority patent/JP5821840B2/ja
Priority to US13/637,511 priority patent/US20130019451A1/en
Publication of WO2011118617A1 publication Critical patent/WO2011118617A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • the present invention relates to a polyamide resin composition for sliding parts, a sliding part, a sliding part, and a method for manufacturing an automobile.
  • Polyamide resin exhibits excellent properties as an engineering plastic, and is therefore used in the manufacture of various machines and parts such as automobile manufacturing, machine manufacturing, electrical and electronic component manufacturing.
  • Polyamide resins are particularly widely used as molding materials for sliding parts such as gears, cams, and bearings because they are excellent in mechanical properties and wear resistance.
  • Patent Document 1 describes a gear for an electric power steering (EPS), and a polyamide resin composition containing a specific amount of polyamide resin and glass fiber is proposed from the viewpoint of improving the wear resistance of parts such as a gear.
  • Patent Document 2 discloses a technique for reducing dimensional changes due to water absorption by using a polyamide resin composition containing polypropylene in polyamide.
  • Patent Document 3 describes a polyamide resin composition using a polyamide resin, a modified polyphenylene ether polymer, a syndiotactic polystyrene polymer, and a modified ethylene / propylene copolymer.
  • a styrene polymer (SPS) having a syndiotactic structure (9.0 to 90.0% by weight), a rubber-like elastic body (1.0 to 50.0% by weight) and a polyamide (9.0 to 90.90%) are disclosed.
  • a polystyrene-based resin composition characterized by containing 0.5 to 10.0 parts by weight of a specific acid-modified polyphenylene ether with respect to a total of 100 parts by weight of 0% by weight is disclosed.
  • the polyamide resin composition disclosed in Patent Document 4 includes a polyamide resin and a specific acid-modified polyphenylene ether added to SPS from the viewpoint of improving the mechanical strength of SPS. From the viewpoint of improving the stability of acid and alkali and the stability of acid / alkali, it is recommended that the amount of polyamide is 80% by weight or less of the total resin. As a result, the amount of blend in the total resin in the examples is SPS. Is used in a large amount of 40 to 45% by weight, and the polyamide resin remains at 50% by weight.
  • Patent Document 4 when polyamide resin is used for sliding parts, the viewpoint of ensuring the high degree of MD direction and TD direction shrinkage, the reduction of its anisotropy, impact resistance and wear resistance, which are recently required for sliding parts. Therefore, the technical idea disclosed in Patent Document 4 is not sufficient.
  • the present invention relates to a polyamide resin composition and a sliding component for sliding parts, in which shrinkage in the MD direction and the TD direction is suppressed (excellent in dimensional stability including water absorption) and excellent in impact resistance, and its It is an object of the present invention to provide a method for manufacturing a sliding component and a method for manufacturing an automobile using the sliding component.
  • the present invention includes the following (1) to (4).
  • a polyamide resin composition for sliding parts comprising a polyamide resin (component A) and a styrene polymer (component B), The deflection temperature under load of the component B is 140 to 280 ° C.
  • a polyamide resin composition for sliding parts wherein a weight ratio (A / B) of the component A to the component B is 95/5 to 77/23.
  • a method for producing a sliding part including a step of molding a polyamide resin composition, A process for producing a sliding part, wherein the polyamide resin composition has an initial shrinkage in the MD direction of 0.2 to 1.2 and an initial shrinkage in the TD direction of 1.0 to 1.4.
  • a method for manufacturing an automobile having a step of incorporating a sliding component obtained by the manufacturing method according to (3) into a sliding device.
  • the shrinkage in the MD direction and the TD direction is suppressed (excellent in dimensional stability including water absorption), and the impact resistance is excellent.
  • the polyamide resin composition for sliding parts and the sliding parts, And the manufacturing method of the sliding component, and the manufacturing method of the motor vehicle using the sliding component can be provided.
  • the polyamide resin composition of the present invention (hereinafter, also referred to as a polyamide resin composition) is a polyamide resin composition for sliding parts comprising a polyamide resin (component A) and a styrene polymer (component B), The deflection temperature under load of the component B is 140 to 280 ° C., The polyamide resin composition for sliding parts, wherein the weight ratio (A / B) between the component A and the component B is 95/5 to 77/23.
  • Component A is preferably obtained by polycondensation of diamine and dicarboxylic acid, self-condensation polymerization of ⁇ -aminocarboxylic acid, ring-opening polymerization of lactams, etc., and has a sufficient molecular weight.
  • the limit PV value is preferably 20 to 1000 MPa ⁇ cm / sec, more preferably 30 to 700 MPa ⁇ cm / sec, still more preferably 40 to 600 MPa
  • the dynamic friction coefficient is preferably 0.001 to 0.7, more preferably 0.005 to 0.6, still more preferably 0.01 to 0.5
  • the impact resistance is preferably 20 to 300 J / m, more preferably 30 to 250 J / m, and still more preferably 40 to 200 J / m.
  • Such physical properties can be achieved by adjusting the composition and number average molecular weight of the following preferred polycondensation raw materials within the range of technical common sense for component A. it can.
  • Aliphatic diamines such as tetramethylenediamine, hexamethylenediamine, undecamethylenediamine, dodecamethylenediamine, 2,2,4-trimethylhexamethylenediamine, 5-methylnonamethylenediamine, 1,3-bisaminomethylcyclohexane, 1 , 4-bisaminomethylcyclohexane, bis-p-aminocyclohexylmethane, bis-p-aminocyclohexylpropane, alicyclic diamines such as isophorone diamine, aromatic diamines such as m-xylylenediamine and p-xylylenediamine Are preferred, tetramethylenediamine and / or hexamethylenediamine are more preferred, and hexamethylenediamine is still more preferred.
  • Aliphatic dicarboxylic acids such as adipic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, alicyclic dicarboxylic acids such as 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, terephthalic acid, isophthalic acid
  • Aromatic dicarboxylic acids such as naphthalenedicarboxylic acid and dimer acid are preferred, adipic acid, terephthalic acid and / or isophthalic acid are more preferred, and adipic acid is still more preferred.
  • the above ⁇ -aminocarboxylic acid is specifically ⁇ -aminocaproic acid, 11- Aminoundecanoic acid and / or 12-aminododecanoic acid are preferred, and ⁇ -aminocaproic acid is more preferred.
  • the lactams are preferably ⁇ -caprolactam, enantolactam and / or ⁇ -laurolactam. , ⁇ -caprolactam is more preferred.
  • these diamines and dicarboxylic acids, or ⁇ -aminocarboxylic acids, or lactams are subjected to polycondensation or the like alone or in the form of a mixture of two or more, and the resulting polyamide homopolymer, copolymer, And mixtures of these homopolymers and / or copolymers can be used.
  • component A having the above preferred composition and physical properties
  • Polyamide 66 / 6T T is a terephthalic acid component
  • one or more compounds selected from the group consisting of polyamide 6T / 6I I is an isophthalic acid component
  • More preferred is one or more compounds selected from the group consisting of polyamide 6, polyamide 66, polyamide 11, polyamide 12, polyamide 6/66, polyamide 66 / 6T, polyamide 6T / 6I,
  • One or more compounds selected from the group consisting of polyamide 6 and polyamide 66 are more preferred.
  • the description of the component A is based on the symbol indicating the chemical structure of the homopolyamide material and the copolyamide material of JIS K
  • the number average molecular weight of component A is preferably 10,000 to 50,000, more preferably 13,000 to 30,000 from the viewpoint of securing the melt properties in order to ensure the mechanical properties of the polyamide-based resin composition and to improve the moldability. Those within the range can be used.
  • Component B is a styrene-based polymer and has a deflection temperature under load of 140 to 280 ° C., preferably 150 to 280 ° C., more preferably from the viewpoint of improving heat resistance and ensuring dimensional stability. 160 to 280 ° C, more preferably 170 to 280 ° C.
  • the styrene polymer is a polymer composed of a structural unit derived from a styrene monomer that is a styrene monomer or a phenyl group of styrene or a substituted phenyl, Polystyrene, poly (alkyl styrene), poly (halogenated styrene), poly (halogenated alkyl styrene), poly (alkoxy styrene), poly (vinyl benzoate), poly (phenyl styrene), poly (vinyl naphthalene), poly (Vinylstyrene), hydrogenated polymers thereof, mixtures thereof, and copolymers containing these as main components are preferred.
  • poly (alkylstyrene) there are poly (methyl styrene), poly (ethyl styrene), poly (isopropyl styrene), poly (tert-butyl styrene), etc.
  • poly (halogenated styrene) include poly (chlorostyrene), poly (bromostyrene), and poly (fluorostyrene).
  • poly (halogenated alkylstyrene) examples include poly (chloromethylstyrene).
  • examples of poly (alkoxystyrene) include poly (methoxystyrene) and poly (ethoxystyrene).
  • Preferred styrenic polymers include polystyrene, poly (p-methylstyrene), poly (m-methylstyrene), poly (p-tert-butylstyrene), poly (p-chlorostyrene), poly (m-chlorostyrene). ), Poly (p-fluorostyrene), hydrogenated polymers thereof, and copolymers containing these structural units.
  • a styrenic polymer can be used individually by 1 type or in combination of 2 or more types.
  • the deflection temperature under load is a measure of the heat resistance of the styrenic polymer.
  • the styrenic polymer is preferably a styrenic polymer having a syndiotactic structure (hereinafter also referred to as SPS)
  • a deflection temperature range under load can be achieved.
  • the deflection temperature under load was measured by applying a stress of 0.46 MPa to a test piece of length 5 inches ⁇ width 1/2 inches ⁇ thickness 1/2 inches molded at a mold temperature of 150 ° C. based on ASTM D-648.
  • the temperature is defined as the temperature at which the temperature is increased at a rate of 2 ° C./min from the normal temperature and bent by 0.25 mm.
  • the syndiotactic structure in SPS means that the three-dimensional structure is a syndiotactic structure, that is, phenyl groups and substituted phenyl groups that are side chains with respect to the main chain formed of carbon-carbon bonds are alternately positioned in opposite directions. It has a three-dimensional structure.
  • a method for producing SPS is disclosed in, for example, Japanese Patent Application Laid-Open No. 2009-68022. SPS is commercially available, for example, from Idemitsu Kosan Co., Ltd. under the trade name “Zarek” (“XAREC”).
  • the tacticity of SPS is quantified by an isotope carbon nuclear magnetic resonance method ( 13 C-NMR method).
  • the tacticity measured by the 13 C-NMR method can be represented by the abundance ratio of a plurality of consecutive structural units, for example, a dyad for two, a triad for three, a pentad for five.
  • component B is usually 75% or more, preferably 85% or more, or 30% or more, preferably 50% or more, racemic pentad, for racemic dyads.
  • Polystyrene with polysity poly (alkyl styrene), poly (halogenated styrene), poly (halogenated alkyl styrene), poly (alkoxy styrene), poly (vinyl benzoate), poly (phenyl styrene), poly (vinyl) Naphthalene), poly (vinyl styrene), hydrogenated polymers thereof and mixtures thereof, or copolymers based on these.
  • Component B has a weight average molecular weight of preferably 10,000 or more, more preferably 50,000 or more, from the viewpoint of not deteriorating the thermal properties and mechanical properties of the resulting composition or molded article.
  • it is 400,000 or less, more preferably 300,000 or less, More preferably, it is 10,000 to 400,000, and still more preferably 50,000 to 300,000.
  • the polyamide resin composition of the present invention further comprises a monomer derived from styrene, a monomer derived from olefin, and / or a monomer derived from conjugated diene. It is preferable to include a thermoplastic resin (component C) (excluding component B) obtained by copolymerization of the monomer.
  • Component C is said to be a styrene-based elastomer resin, and is considered to form a core-shell structure in which component C is a core and component B is a shell by being compatible with component B in a polyamide resin composition.
  • the limit PV value indicating the impact resistance and slidability of the polyamide resin composition is greatly improved.
  • styrene-butadiene copolymer SBR
  • hydrogenated styrene-butadiene block copolymer SEB
  • Styrene-butadiene-styrene block copolymer SEBS
  • hydrogenated styrene-butadiene-styrene block copolymer SEBS
  • styrene-isoprene block copolymer SIR
  • hydrogenated styrene-isoprene block copolymer SEP
  • Hydrogenated styrene-isoprene-styrene block copolymer SEP
  • SIS Hydrogenated styrene-isoprene-styrene block copolymer
  • SIS styrene-butadiene random copolymer
  • Component C is a thermoplastic elastomer such as Kuraray Septon, which is composed of a polystyrene block and an elastomer block having a flexible polyolefin structure, and is commercially available as a block copolymer based on diblock and triple block. You can use what you have.
  • a thermoplastic elastomer such as Kuraray Septon, which is composed of a polystyrene block and an elastomer block having a flexible polyolefin structure, and is commercially available as a block copolymer based on diblock and triple block. You can use what you have.
  • the polyamide resin composition of the present invention further comprises a styrene-polyamide block copolymer and a styrene-glycidyl methacrylate copolymer from the viewpoint of improving the limit PV value that exhibits impact resistance and insulative properties by compatibilizing components A and B.
  • One or more compounds selected from the group consisting of polymers, styrene-maleic anhydride copolymers, maleic anhydride modified styrene block copolymers, maleic anhydride modified polyphenylene ether, maleic anhydride modified SPS, and fumaric acid modified polyphenylene ether (however, excluding Component B) is preferably included.
  • Component D is a thermoplastic resin component for compatibilizing components A and B.
  • component D When component D is added to components A and B, component B can be finely dispersed in component A.
  • a styrene-polyamide block copolymer From the viewpoint of avoiding deterioration in mechanical properties due to the dispersibility of component B relative to component A and insufficient interfacial strength with component A, a styrene-polyamide block copolymer, a styrene-glycidyl methacrylate copolymer, a styrene-maleic anhydride copolymer Polymers, maleic anhydride-modified styrene block copolymers, maleic anhydride-modified polyphenylene ether, maleic anhydride-modified SPS, and fumaric acid-modified polyphenylene ether are preferable, and fumaric acid-modified polyphenylene ether is more preferable (hereinafter, polyphen
  • the polyamide resin composition of the present invention preferably further contains glass fiber (component E) from the viewpoint of dimensional stability including the time of water absorption of the polyamide resin.
  • Component E is preferably focused by a known sizing agent (binder) mainly composed of acrylic resin, epoxy resin or urethane resin, What is bundled with a sizing agent mainly composed of acrylic resin or epoxy resin is preferable.
  • Component E may be pretreated with a coupling agent such as an isocyanate compound, an organic silane compound, an organic titanate compound, an organic borane compound, or an epoxy compound, to further improve the mechanical properties of the resulting molded product. It is preferable because improvement is expected.
  • Component E is from the viewpoint of dimensional stability including when the polyamide resin absorbs water,
  • the weight average fiber length is preferably 100 to 1000 ⁇ m, more preferably 150 to 600 ⁇ m, still more preferably 200 to 500 ⁇ m,
  • the average fiber diameter is preferably 3 to 20 ⁇ m, more preferably 4 to 15 ⁇ m, still more preferably 5 to 13 ⁇ m.
  • reinforcing agents and fillers of various shapes such as fibrous, powdery, flakey or matte may be added and blended as long as the molding processability and physical properties are not impaired. it can.
  • these reinforcing agents and fillers include Carbon fiber, silica fiber, silica alumina fiber, alumina fiber, zirconia fiber, boron nitride fiber, silicon nitride fiber, basic magnesium sulfate fiber, boron fiber, stainless steel fiber, aluminum, titanium, copper, brass, magnesium and other inorganic materials and Metal fiber, Organic fibers such as polyester, polyacrylonitrile, cellulose, Metal powders such as copper, iron, nickel, zinc, tin, stainless steel, aluminum, gold, silver, fumed silica, aluminum silicate, calcium silicate, silicic acid, hydrous calcium silicate, hydrous aluminum silicate, glass beads, carbon black, quartz Examples include powder, talc, mica, titanium oxide, iron oxide, zinc oxide
  • reinforcing agents and fillers may be surface-treated with a known silane coupling agent or titanate coupling agent. These reinforcing agents and fillers may be used alone or in combination of two or more.
  • Hindered phenols, hydroquinones, thioethers, phosphites, amines, and organic antioxidants that are substituted products thereof, cuprous chloride, cupric chloride, cuprous bromide, cupric bromide, iodine Cuprous iodide, cupric iodide, cupric sulfate, cupric nitrate, cupric phosphate, cupric pyrophosphate, cuprous acetate, cupric acetate, cupric salicylate, stearic acid Copper compounds such as cupric and cupric benzoate, potassium iodide, lithium chloride, lithium bromide, lithium iodide, lithium fluoride, sodium chloride, sodium bromide, sodium iodide, potassium chloride, potassium bromide Antioxidants such as alkali metal halides such as potassium iodide and potassium fluoride, inorganic antioxidants such as cerium oxide, titanium oxide,
  • the polyamide-based resin composition of the present invention is 100% by weight of the total thermoplastic resin component of the polyamide-based resin composition,
  • the weight% of component A is preferably 30 to 95% by weight, more preferably 35 to 80% by weight, and still more preferably 40 to 65% by weight.
  • blended as a reinforcing agent is not included in the thermoplastic resin component of a polyamide-type resin composition.
  • the weight ratio (A / B) of component A to component B is 95/5 to 77/23, preferably 90 from the viewpoint of dimensional stability including water absorption. / 10 to 77.5 / 22.5, more preferably 85/25 to 77.5 / 22.5, still more preferably 82/18 to 77.5 / 22.5, still more preferably 80/20 to 79/21.
  • the weight ratio (B / C) of component B to component C is preferably 100/0 to 50/50, more preferably from the viewpoint of the limit PV value and the friction coefficient. 99/1 to 50/50, more preferably 90/10 to 60/40, more preferably 80/20 to 60/40, and still more preferably 70/30 to 65/35.
  • the total amount of component A and component B and the weight ratio of component D ((A + B) / D) is preferably 100/0. -50/50, more preferably 95/5 to 60/40, still more preferably 92/8 to 80/20, still more preferably 91/9 to 85/25.
  • the polyamide resin composition of the present invention is a weight ratio of the weight of component E and the total amount of components A, B, C and D of the polyamide resin composition from the viewpoint of further enhancing the dimensional stability including water absorption.
  • E / (A + B + C + D)) is preferably 10/90 to 50/50, more preferably 15/85 to 40/60, and still more preferably 20/80 to 30/70.
  • the polyamide-based resin composition of the present invention contains 69.45 to 85% by weight of Component A, 100% by weight of Component A, B and D, and Component B Is 10 to 25% by weight, and component D is preferably 5 to 20% by weight.
  • the polyamide-based resin composition of the present invention For a total of 100% by weight of components A, B, D and E, 50 to 75% by weight of component A, 10-20% by weight of component B, It is preferred that component D is 5 to 10% by weight and component E is 10 to 30% by weight.
  • the polyamide-based resin composition of the present invention For a total of 100% by weight of components A, B, D and E, Component A is 52.09 ⁇ 100 / 99.59) to 75% by weight, Component B is 10 to (15.06 ⁇ 100 / 99.59) wt%, It is preferable that component D is 5 to (7.50 ⁇ 100 / 99.59) wt%, and component E is 10 to (25.00 ⁇ 100 / 99.59) wt%.
  • the polyamide resin composition of the present invention comprises a polyamide resin (component A), a styrenic polymer (component B), and optionally component C, component D and / or glass fiber (component E) within a predetermined ratio.
  • a polyamide resin component A
  • a styrenic polymer component B
  • optionally component C, component D and / or glass fiber component E
  • melt kneading by melt kneading by a known method using a known melt kneader such as a uniaxial or biaxial kneading extruder or a Banbury mixer. In the melt-kneading, the above-mentioned various additives are added as necessary.
  • the polyamide resin composition of the present invention can be used for sliding members such as automobiles, machine gears, pulleys, cams, and bearings of various shapes using known molding methods such as extrusion molding, blow molding, and injection molding. It can be a molded product, preferably a gear, more preferably an EPS gear.
  • the polyamide resin composition of the present invention can be advantageously used for the production of sliding members such as gears, pulleys, cams, bearings and the like of automobiles and machines, more preferably gears, especially EPS gears.
  • gears, pulleys, cams, and bearings that have a large effect of exerting dimensional stability including the water absorption of the present invention are preferred. More preferred are automobiles and gears, and even more preferred are EPS gears.
  • the manufacturing method of a sliding component of the present invention is a manufacturing method of a sliding component having a step of molding a polyamide resin composition,
  • Initial shrinkage in the MD direction is 0.2 to 1.2
  • initial shrinkage in the TD direction is 1.0 to 1.4
  • Preferably, Initial shrinkage in the MD direction is 0.2 to 0.4
  • initial shrinkage in the TD direction is 1.0 to 1.2
  • More preferably, Initial shrinkage in the MD direction is 0.2 to 0.35
  • initial shrinkage in the TD direction is 1.0 to 1.2
  • the polyamide resin composition has a anisotropic value of preferably 0 to 5, more preferably 0 to 4, and still more preferably 0 to 3.8.
  • the size of the polyamide resin composition changes due to swelling due to water absorption or the like.
  • an injection molding method for example, an injection molding method, an injection compression molding method, a compression molding method, an extrusion molding method, a blow molding method and the like are suitable.
  • Such initial shrinkage in the MD direction is 0.2 to 1.2
  • initial shrinkage in the TD direction is 1.0 to 1.4
  • Preferably, Initial shrinkage in the MD direction is 0.2 to 0.4
  • initial shrinkage in the TD direction is 1.0 to 1.2
  • More preferably, Initial shrinkage in the MD direction is 0.2 to 0.35
  • initial shrinkage in the TD direction is 1.0 to 1.2
  • the polyamide resin composition is preferably the polyamide resin composition of the present invention.
  • the automobile manufacturing method of the present invention is a manufacturing method of an automobile having a step of incorporating a sliding component obtained by the above-described sliding component manufacturing method of the present invention into a sliding device.
  • a process of incorporating the sliding component obtained by the manufacturing method of the sliding component of the present invention into the sliding device for example, in an electric power steering device, there is a system that directly uses the driving force of the electric motor for steering assist.
  • the sliding parts obtained by the manufacturing method of the sliding parts of the present invention such as an electric power steering gear and a worm wheel, have a role of assisting the steering of the motor through the parts, and each assist system Properly assembled and manufactured.
  • a polyamide resin composition having such an anisotropy value When a polyamide resin composition having such an anisotropy value is used in the step of incorporating the sliding component obtained by the manufacturing method of the sliding component of the present invention into a sliding device, it swells due to water absorption or the like. Because the change in the dimensions of the polyamide resin composition due to the above reduces the meshing effect between the sliding part, for example, the gear and the other member, in anticipation of such a dimensional change, the sliding part in the automobile manufacturing process In some cases, it may not be necessary to machine a small amount in advance, for example, in a car, it may not be necessary to install a backlash adjusting mechanism that compensates for the reduction in the meshing effect. Factors that increase manufacturing costs can be reduced.
  • the physical property values of the molded products shown in Examples and Comparative Examples described later are values measured by the following measuring methods.
  • the pellets obtained in each of the following examples and comparative examples were An injection mold for molding a plate having an outer dimension (mold dimension) of 200 mm in length, 40 mm in width, and 3 mm in thickness with a 140 mm length and 30 mm width marking line, Measure the dimensions in the MD direction and TD direction of the test piece, which is a molded product injection-molded under the molding conditions of the following examples and comparative examples, The ratio of shrinkage was calculated from the die line size of the mold and used as the initial shrinkage.
  • the marking line dimensions of the mold are 140 mm in length (MD direction), 30 mm in width (TD direction), and 3 mm in thickness.
  • anisotropy The ratio of the initial shrinkage between the TD direction and the MD direction was defined as anisotropy.
  • the limit PV value was calculated from the product of the threshold pressure and the peripheral speed.
  • the limit pressure is a pressure that is one step before the pressure at which the resin melts at a pressure that is gradually increased.
  • the same test as measuring the limit PV value was performed, and the dynamic friction coefficient was calculated from the frictional resistance force at the limit pressure.
  • the frictional resistance can be obtained by detecting the force of rubbing between the resin plate and the metal cylinder with a load cell using a friction and wear tester (FEM-III-EN / F).
  • the dynamic friction coefficient is obtained by dividing the frictional resistance by the load. Since the frictional resistance detection arm used is 10 times the radius of the metal ring, the value obtained by multiplying the value by 10 is the dynamic friction coefficient.
  • Polyamide 66 (PA66-1) composed of hexamethylenediamine and adipic acid (number average molecular weight: 26000, 2026B manufactured by Ube Industries, Ltd.) (component A) 77.45% by weight, Styrene polymer (SPS-1) (deflection temperature under load: 179 ° C., weight average molecular weight: 230000, XAREC 90ZC manufactured by Idemitsu Kosan Co., Ltd.) (component B) 22% by weight, Cuprous iodide 0.03% by weight, potassium iodide 0.5% by weight, and melamine resin 0.02% by weight, The mixture was kneaded with a 44 mm vented twin screw extruder set at a barrel temperature of 285 ° C., and pelletized after cooling to obtain polyamide resin composition pellets.
  • SPS-1 Styrene polymer
  • component B 22% by weight
  • the obtained polyamide resin composition pellets were dried at 100 ° C. under a reduced pressure of 10 Torr (1330 Pa) or less for 24 hours, and then injection molded at a cylinder temperature of 285 ° C. and a mold temperature of 80 ° C. for various tests. Pieces were produced. The above-mentioned various measurements and calculations were performed on the obtained test piece.
  • the polyamide 66 (PA66-1) used had a limit PV value of 50 MPa ⁇ cm / sec, a dynamic friction coefficient of 0.5, and an impact strength of 40 J / m.
  • Example 2 PA66-1 (number average molecular weight: 26000, 2026B manufactured by Ube Industries, Ltd.) (component A) 94.45% by weight, SPS-1 (deflection temperature under load: 179 ° C., weight average molecular weight: 230000, XAREC90ZC manufactured by Idemitsu Kosan Co., Ltd.) (component B) 5% by weight, Cuprous iodide 0.03% by weight, potassium iodide 0.5% by weight, and melamine resin 0.02% by weight, Polyamide resin composition pellets were obtained by the same method as in Example 1, and various test pieces were produced. The above-mentioned various measurements and calculations were performed on the obtained test piece.
  • PA66-1 (number average molecular weight: 26000, 2026B manufactured by Ube Industries, Ltd.) (component A) 69.45% by weight, Styrene polymer (SPS-2) (deflection temperature under load: 189 ° C., weight average molecular weight: 190000, XAREC 130ZC manufactured by Idemitsu Kosan Co., Ltd.) (component B) 20% by weight, 10% by weight of fumaric acid-modified PPE (CX-1 manufactured by Idemitsu Kosan Co., Ltd.) (component D) Cuprous iodide 0.03% by weight, potassium iodide 0.5% by weight, and melamine resin 0.02% by weight, Polyamide resin composition pellets were obtained by the same method as in Example 1, and various test pieces were produced. The above-mentioned various measurements and calculations were performed on the obtained test piece.
  • Polyamide 66 (PA66-2) comprising xamethylenediamine and adipic acid (number average molecular weight: 20000, 2020B manufactured by Ube Industries, Ltd.) (component A) 73.45% by weight, SPS-1 (deflection temperature under load: 179 ° C., weight average molecular weight: 230000, XAREC90ZC manufactured by Idemitsu Kosan Co., Ltd.) (component B) 16% by weight, 10% by weight of fumaric acid-modified PPE (CX-1 manufactured by Idemitsu Kosan Co., Ltd.) (component D) Cuprous iodide 0.03% by weight, potassium iodide 0.5% by weight, and melamine resin 0.02% by weight, Polyamide resin composition pellets were obtained by the same method as in Example 1, and various test pieces were produced.
  • PA66-1 (number average molecular weight: 26000, 2026B manufactured by Ube Industries, Ltd.) (component A) 52.09% by weight, SPS-2 (load deflection temperature: 189 ° C., weight average molecular weight: 190,000, Idemitsu Kosan Co., Ltd. XAREC130ZC) (component B) 15% by weight, Fumaric acid modified PPE (Idemitsu Kosan Co., Ltd.
  • PA66-2 (number average molecular weight: 20000, 2020B manufactured by Ube Industries, Ltd.) (component A) 54.2% by weight, SPS-2 (deflection temperature under load: 189 ° C., weight average molecular weight: 190000, XAREC130ZC manufactured by Idemitsu Kosan Co., Ltd.) (component B) 15.5% by weight, Fumaric acid-modified PPE (Idemitsu Kosan Co., Ltd.
  • PA66-2 (number average molecular weight: 20000, 2020B manufactured by Ube Industries, Ltd.) (component A) 49.2% by weight, SPS-2 (deflection temperature under load: 189 ° C., weight average molecular weight: 190000, XAREC 130ZC manufactured by Idemitsu Kosan Co., Ltd.) (component B) 13.0% by weight, SEBS (Septon 2104 manufactured by Kuraray Co., Ltd.) (component C) 5.7% by weight, Fumaric acid modified PPE (Idemitsu Kosan Co., Ltd.
  • PA66-2 (number average molecular weight: 20000, 2020B manufactured by Ube Industries, Ltd.) (component A) 49.2% by weight, SPS-2 (deflection temperature under load: 189 ° C., weight average molecular weight: 190000, XAREC 130ZC manufactured by Idemitsu Kosan Co., Ltd.) (component B) 13.0% by weight, SEPS (Kuraray Co., Ltd. Septon 2104) (component C) 5.7% by weight, Fumaric acid modified PPE (Idemitsu Kosan Co., Ltd.
  • PA66-2 (number average molecular weight: 20000, 2020B manufactured by Ube Industries, Ltd.) (component A) 51.2% by weight, SPS-2 (Load deflection temperature: 189 ° C., weight average molecular weight: 190000, XAREC 130ZC manufactured by Idemitsu Kosan Co., Ltd.) (component B) 11.0% by weight, SEPS (Kuraray Co., Ltd. Septon 2104) (component C) 5.7% by weight, Fumaric acid modified PPE (Idemitsu Kosan Co., Ltd.
  • Example 1 The measurement results and calculation results in Examples 1 to 9 and Comparative Examples 1 and 2 are shown in Table 1.
  • the “impact resistance”, “limit PV value”, and “dynamic friction coefficient” shown in Table 1 are values for the polyamide resin compositions of Examples 1 to 9 and Comparative Examples 1 to 3.
  • the molded product molded from the polyamide resin composition according to the present invention has a small initial shrinkage, suppresses warpage deformation of the molded product, and has a difference from the design dimension. This makes it possible to save labor in post-processing steps for correction. That is, according to the present invention, the shrinkage in the MD direction and the TD direction is suppressed (excellent dimensional stability including water absorption) and the impact resistance is excellent. It is possible to provide a component, a method for manufacturing the sliding component, and a method for manufacturing an automobile using the sliding component.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Gears, Cams (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Cette invention concerne une composition de résine polyamide pour parties coulissantes qui contrôle la contraction dans le sens machine (MD) et le sens transversal (TD)(a une stabilité dimensionnelle supérieure, y compris lors d'absorption d'eau) et présente une résistance au choc supérieure ; une partie coulissante à base de celle-ci ; un procédé de production de ladite partie coulissante et un procédé de production d'une automobile utilisant ladite partie coulissante. La composition de résine polyamide pour parties coulissantes selon l'invention contient une résine polyamide (composant A) et un polymère styrénique (composant B), ledit composant B ayant une température de déflexion sous charge de 140 à 280°C, et le rapport (A/B) en poids du composant A et du composant B étant de 95/5 à 77/23.
PCT/JP2011/056942 2010-03-26 2011-03-23 Composition de résine polyamide pour partie coulissante, partie coulissante et procédé de production d'une partie coulissante et d'une automobile Ceased WO2011118617A1 (fr)

Priority Applications (4)

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CN2011800162674A CN102884133A (zh) 2010-03-26 2011-03-23 滑动部件用聚酰胺树脂组合物、滑动部件以及滑动部件和汽车的制造方法
KR1020127027248A KR20130018265A (ko) 2010-03-26 2011-03-23 슬라이딩 부품용 폴리아미드 수지 조성물, 슬라이딩 부품 및 슬라이딩 부품과 자동차의 제조 방법
JP2012507028A JP5821840B2 (ja) 2010-03-26 2011-03-23 摺動部品用ポリアミド樹脂組成物、摺動部品並びに摺動部品及び自動車の製造方法
US13/637,511 US20130019451A1 (en) 2010-03-26 2011-03-23 Polyamide resin composition for sliding part, sliding part, and method for producing a sliding part as well as method for producing an automobile

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JP2013155788A (ja) * 2012-01-27 2013-08-15 Showa Corp 電動パワーステアリング装置用ギヤ
WO2013147069A1 (fr) * 2012-03-30 2013-10-03 宇部興産株式会社 Composition de résine polyamide renforcée de fibres de verre, et corps moulé ainsi que composant coulissant mettant en œuvre celle-ci
JP2015023101A (ja) * 2013-07-17 2015-02-02 大日本印刷株式会社 半導体発光装置、半導体発光装置用部品及びそれらの製造方法、並びに反射体、その製造方法及び反射体形成用組成物
WO2020129211A1 (fr) * 2018-12-20 2020-06-25 本田技研工業株式会社 Engrenage auxiliaire pour moteur à combustion interne
WO2020196606A1 (fr) * 2019-03-26 2020-10-01 出光興産株式会社 Composition de résine de polystyrène

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JP2880240B2 (ja) 1990-04-03 1999-04-05 上村工業株式会社 プリント基板の気泡脱泡装置
JP6254988B2 (ja) * 2015-10-21 2017-12-27 矢崎総業株式会社 ヘッドアップディスプレイ装置
US20200102431A1 (en) * 2017-10-06 2020-04-02 Nitto Boseki Co., Ltd. Glass fiber-reinforced resin molded article
US20200340529A1 (en) * 2017-11-16 2020-10-29 Unitika Ltd. Sliding member

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
JP2013155788A (ja) * 2012-01-27 2013-08-15 Showa Corp 電動パワーステアリング装置用ギヤ
WO2013147069A1 (fr) * 2012-03-30 2013-10-03 宇部興産株式会社 Composition de résine polyamide renforcée de fibres de verre, et corps moulé ainsi que composant coulissant mettant en œuvre celle-ci
JPWO2013147069A1 (ja) * 2012-03-30 2015-12-14 宇部興産株式会社 ガラス繊維強化ポリアミド樹脂組成物、それを用いた成形体及び摺動性部品
JP2015023101A (ja) * 2013-07-17 2015-02-02 大日本印刷株式会社 半導体発光装置、半導体発光装置用部品及びそれらの製造方法、並びに反射体、その製造方法及び反射体形成用組成物
WO2020129211A1 (fr) * 2018-12-20 2020-06-25 本田技研工業株式会社 Engrenage auxiliaire pour moteur à combustion interne
CN113195942A (zh) * 2018-12-20 2021-07-30 本田技研工业株式会社 内燃机用辅机齿轮
JPWO2020129211A1 (ja) * 2018-12-20 2021-10-21 本田技研工業株式会社 内燃機関用補機歯車
JP7058350B2 (ja) 2018-12-20 2022-04-21 本田技研工業株式会社 内燃機関用補機歯車
WO2020196606A1 (fr) * 2019-03-26 2020-10-01 出光興産株式会社 Composition de résine de polystyrène

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KR20130018265A (ko) 2013-02-20

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